This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
| n | a(n) |
|---|---|
| 1 | 24 |
| 2 | 51840 |
| 3 | 9170703360 |
| 4 | 131569513308979200 |
| 5 | 152915585868239728626892800 |
| 6 | 14395932257291877030764312963579904000 |
| 7 | 109777561863482259035023554842176139436811616256000 |